Throttle-controlled auxiliary air-supply device.



APPLICATION FILED- JAN. 11. I9I3.

Patented Feb. 4 1919.

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EDWARD G. HODGES, F MARSHALLTOWN, IOWA.

wearer.

THROTTLE-CONTROLLED AUXILIARY AIR-SUPPLY DEVICE.

Specification of Letters Patent.

Patented Feb. 4t, 1219.

Application filed January 11, 1918. Serial No. 211,462.

To all whom it may concern:

Be it known that I, EDWARD G. Honens,

- a citizen of the United States, and resident of Marshalltown, in the county of Marshall and State of Iowa, have invented'a certain new and useful Throttle-Controlled Auxiliary'Air-Supply Device for Explosive-Enbureter at a point between the throttle valve in the carbureter and the engine, and to provide a valve in said pipe, which valve is designed to be controlled by the throttle control lever.

A further object is to provide such a device so arranged that the valve in the air supply pipe is held in substantially closed position when the throttle valve is in position for starting the engine and is moved toward open position when the throttle valve ismoved from such starting position toward closed position ortoward wider openposition.

My device is especially designed for use with explosive engines used onmotor vehicles and having a carbureter with a throttle and a throttle controlling lever usually arranged on the steering wheel.

With these and other objects in view my invention consists in the construction, ar-

rangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Figure 1 showsa side elevation of a carburetor equipped with an auxiliary air supply device embodyingmy invention' Fig. 2 shows a detail, sectional view taken on the line' 22 of Fig. 1.

Fig. 3 shows a vertical, sectional, detail view through part of the controlling mechanism.

Fig. 4 shows a plan view of the steering Wheel and the throttle controlling Ilever thereon; and Fig. 5 shows a side elevation of the steer= ing wheel and part of the mechanism mounted thereon, the dash being shown in vertical section.

In the accompanying drawings I have used the reference numeral 10 to indicate generally a steering post of ordinary construotion having at its upper end the steering wheel 11. On the steering wheel is mounted the ordinary sector 12 on which travels the throttle controlling lever 13, which is operatively connected with a rod 14 extending downwardly,- through the steering post.

On the lower end of the valve 1 1 is a beveled gear 15 in mesh with another beveled gear 16 on a short upright shaft 17. Fixed on the upright shaft 17 is an arm 18 pivoted to a forwardly extending link 19. At its forward end the link 19 has an extension 20 which is pivoted to the arm 21 fixed on the stem 22 of the throttle valve 23 in the carbureter 24.

Leading from the carbureter 24 is a tube or passage 25 for conducting fuel mixture to the intake manifold, and which in one sense forms part of the intake manifold.

Communicating with'the passage 25 is an auxiliary air supply pipe 26. The air supply pipe 26 may be open to the air or may be extended to or connected with any part of the engine for picking up hot air or vapors.

The air supply pipe 26 is provided with a valve casing 27 in which is mounted a butterfly valve 28 having a stem 29 projecting through the casing 27.

Fixed to the stem 29 is a lever 30 extending away from the casing 27 and pivoted at its outer end to a sleeve 31.

Fixed to the forward end of the link 19 is a forwardly extending rod 32 telescopically received in the sleeve 31.

Mounted on the sleeve 31 and secured thereto is a coil spring 33, which is also secured to the rod 32, as shown in Fig. 3.

There is provided at a suitable point an adjustable stop 34 which limits the movement of the lever 30 in one direction.

The throttle control lever 13 is shown in Fig. 4: in substantially the proper position for starting the engine and for holding the throttle valve 23 slightly open. There is provided an adjustable stop 35 which limits the movement of the throttle valve 23 toward closed position.

When the throttle valve 23 is slightly opened and in proper position for starting the parts are so arranged that the butterfly valve 28 is then in closed position. When the throttle control lever 13 is moved toward the point marked A for moving the throttle valve 23 as far as possible toward its closed position, the arrangement of the parts is such that the valve 28 is opened. lVhen valve 23.

vantages.

the throttle control lever 13 is moved in the opposite direction for opening the valve 23 such movement also opens the valve 28. The stop 34; is so arranged that it is engaged by the lever 30 when the valve 28 is open, and thereafter the throttle control lever 13 may be moved for further opening the throttle During such further opening movement it will be seen that .the spring 33 may be extended without imparting any further movement to the lever 30.

It will be obvious from the foregoing that p the butterfly valve 28 is in position for closment of the throttle valve from its slightly open position mentioned, will result in an opening movement of the butterfly'valve 28.

In the practical use of my device, especially if it is desired to start the engine, the ordinary procedure is to open the throttle valve slightly. This would move the butterfly valve to closed position so that the mixture would be fed from the carbureter to the engine-in'the ordinary way and there would be only a slight leakage through the air supply pipe. If the engine is started and the car is allowed to stand for a few minutes, or the engine is allowed to idle, the throttle may bemoved toward closed position, whereupon the butterfly valve will be moved in one direction for opening it for supplying air to the mixture passing to the engine.

Ordinarily where no .device of this kind is used, the mixture supplied to the engine, when the engine is idling, is either too rich or is too small in volume, with the result that the engine is either raced or a poor explosion is secured. Where my device is used and the throttle valve is moved to closed position the auxiliary air supply device When the engine is idling and the-throttle valve is as nearly closed as possible, an auxiliary supply of air is furnished for affording a full volume of fuel mixture, thereby permitting the engine to have proper compression and to secure proper explosion, and for avoiding the drawing of too much oil from the crank case as might be done in case not enough volume of mixture should be supplied to the engine. Wherethe throttle is opened for running at high j speed an auxiliary air supply is afforded for giving a proper mixture at the -higher speeds.

It will berof course understood that "the stop 34 may be adjusted or set in any desired position for causing thebutterfly valve 28 to be stopped at the desired point in its opening movement.

In this connection it may be mentioned that thestop 34:is mounted on a clamp band 35 adjustably mounted on the valve cas ing 27.

The rod 32 is pivoted'to the link 19 and the sleeve'31 is detachably and adjustably connected with the lever 30 by'means of a pin or bolt 36 extended through holes in the sleeve 33 and selectively mounted in one of a series of holes 37 in the lev'er 30, said holes beingshown by dotted lines in Fig. '2.

An adjustment of the sleeve 31 "on the lever 30 for varying the efiective length of the lever 30 is desirous in order to regulate the relative movement of the butterfly valve same saving in fuel and other advantagesmentioned in my above identified co-pending application.

In'the device shownherein it will b'e-noted that I am able to control the auxiliary air supply according to the movement of the throttle, and that an auxiliary air supply is aiforded when the throttle :valve is moved in eitherdirection from its proper position for starting the engine, and this result is accomplished byso mounting the butterfly valve 28 as to permit it to be swung in'both directions from closed position.

While Ihave shown and "described a butterfiy valve for controlling-"the passageof air through the auxiliary air 'supply device it ismy intention to cover anyiormrof-valve which would be adapted for accomplishing the same purpose.

It maybe noted that when "the throttle lever 13 is at the point marked A the throttle valve is closed. While theengine is idling or runnii'ig at high speed with no load the butterfly valve is open for furnishing air for a proper mixture.

When the throttle lever is moved to any position between the points C and D for instance, both for starting the engine and pulling a heavy load, the butterfly valve will be at or near its closed position during a considerable ,range of movement on the throttle control lever. When the lever 13 is moved beyond the point D for instance, for further opening the throttle valve when the engine is running at high speed, the butterfly valve will move toward its open position for admittingconsiderable air through the air supply pipe and thus affording a proper mixture.

It should be understood that many of the parts of my device may be changed in their construction and arrangement and use of material without departing from the real purpose and intent of my invention, and that it is my intention to cover by the claims of this application and patent to be issued thereon, any such changes which may be reasonably included within the scope of my claims.

1. In a device of the class described, a fuel mixture conducting passage designed to be connected with the intake manifold of an internal combustion engine, a throttle valve in said passage, means for operating said throttle valve, an air supply tube communicating with said passage between said throttle valve and the discharge end of the passage, a second valve in said air supply pipe adapted to swing freely in either direction from its closed position and having a stem projecting from said pipe, a lever fixed to said stem, a pair of yieldably connected members operatively connected respectively with said first means and with said lever, and telescopically mounted with relation to each other.

2.- In a device of the class described, a fuel mixture conducting passage designed to be connected with the intake manifold of an internal combustion engine, a throttle valve in said passage, means for operating said throttle valve, an air supply tube communicating with said passage between said throttle valve and the discharge end of the passage, a second valve in said air supply pipe adapted to swing freely in either direction from its closed position and having a stem projecting from said pipe, a lever fixed to said stem, a pair of yieldably connected members operatively connected respectively with said first means and with said lever and telescopically mounted with relation to each other, and an adjustable stop device for en gaging said lever.

Des Moines, Iowa, December 28, 1917. EDWARD G. HODGES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

